Fireproof paint



106. COMPOSITIONS,

comma R PLASTIC.

UNITED STATES /3677& Examiner PATENT OFFICE.

GUSTAV A. WOBTELMANN, OF NEW YORK. N. Y.

FIBEPROOF PAINT.

Io Drawing.

To all whom it may concern Be it known that I, GUSTAV A. VVoR'rnL- MANN, a citizen of Germany, and a resident of the borough of Manhattan, city of New York, county and State of New York, have invented certain new and useful Improve ments in Fireproof Paint, of which the following is aspecification.

The invention as indicated by its title relates to ints and particularly to fire proofing or re resisting paints, in fact it contemplates a coatin for wood, metal, fabric, or any material w ich it may partially or wholly coat and impregnate and to which it will then give the desired characteristic of resisting comparatively high temperatures.

In roducing the composition I utilize as a vehicle a solution of sodium silicate of about 40 Be, 0 t 1s m w 1c in 1 se 1s 1g y a a ine and fire resistant I add a substantial content of water, very finely powdered or ground asbestgs or other forms owdered ma esium silicates, powdered 5 mm hos a an an a ueous solution of ma neslum sulfate. TlllS mlxture w 1611 painted on the surface of any material upon drying forms a hard glass like enamel of the ingredients above mentioned. When exposed to heat the sodium silicate and powdered asbestos are converted into a uble silicam of sodium and magpesium while the sodium phosp ate an magnesium sulfate forms a ma esium ro hos hate. Both of these sulistances formed are highly resistant to fire and heat.

In order that a mixture be formed which may be painted smoothl and evenly a small quantity of any sa oni ed resin or m together with a trace of l menu is a ed. It is to be understood that where I refer to resins and gums herein that these two expressions are to be considered equivalents of each other.

The general proportion of ingredients used is parts by weight of solution of dium silicate co lie, 40 parts by weight of water, parts by weight of the powdered asbestos ibother a V esium silicate, 2 parts y welg powr so ium os hate, 2 parts by weight of 10% solution of uggsium e, 2 parts by weight of a 10% solution of sa omfied resin, and 1 part by weight of cerm.

The above statements do not imply how- Specification of Letters Patent.

Patented Nov. 15, 1921 ever that I could not use the potassium salts wherever sodium salts are IIIGHUODQt.

In the same manner I could replace the saponified resin or gum and glycerin which are present only for smoothing out and making the mixture more adaptable for painting purposes by similar substances as for in stance casein. lue, or other like material.

The paint drles readily and with a smooth surface as does any ordinary pain-t. It imregnates the fiber of the material to which it is applied, and as the liquid content of the mixture is dispersed either by evaporation or by the absorption into the fiber of the material it provides a fire proofing and a fire resisting element through its impregnations as well as a firm coating by the deposit of the materials which are held in solution and suspension.

This is quite different from the ordinary paints havmg an oil or hydrocarbon vehicle or solvent, inasmuch as such vehicles would be absorbed by the fiber of the material to which they are applied and increase the inflammability of the material.

The paint herein described may be used upon fabrics as well as wood and metal and causes no disintegration and has no destructive reaction or absorbing influence upon the texture of the fabric.

In conjunction with this mixture any desired pigments may be employed.

For instance, go or efi'ect may be secured by, employing a silicate, either the terre ve t -which is a form of een ochre contaming the silicate of iron potassium and ma esium of salt which is a silicate Ff cobalt and potasslum:

n mu 0 t ese or in conjunction therewith, any desired water color i cut may be employed to give the particular color effect desired.

Obviously the paint mixture is subject to modification and change as to its constituent partsand to substitution of elements which ble silicate of magnesium and sodium together with magnesium pyrophosphate.

3. A fire proof aint consisting of a solution of sodium silicate, sodium phosphate and magnesium sulfate and holding in suspension finely divided asbestos wliich mixture has been made suitable for painting purposes by the addition of saponified resins together with some glycerin.

4. A fire proof paint composed of sodium silicate, water, powdered asbestos, sodium phosphate, magnesium sulfate, saponified resin and glycerin and having a coloring pigment.

5. A fire proof paint consisting of 60 parts by weight of solution of sodium silicate 40 B., 40 parts by weight of water, 60 parts by weigit of powdered asbestos or other magnesium silicate, 2 parts by weight of powdered sodium phosphate, 2 parts by weight of 10% solution of magnesium sulfate, 2 parts by weight of a 10% solution of saponified resin and 1 part by weight of lycerin substantially as set forth and for t e purposes specified.

6. A fireproof paint comprising sodium silicate, water, powdered asbestos, sodium phosphate and magnesium sulfate.

This specification signed this 29th day of November. 1920.

GUSTAV A. VVORTELMANN. 

